| // Copyright 2021 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "src/dawn_node/binding/GPU.h" |
| |
| #include "src/dawn_node/binding/GPUAdapter.h" |
| |
| #include <cstdlib> |
| |
| namespace { |
| std::string getEnvVar(const char* varName) { |
| #if defined(_WIN32) |
| // Use _dupenv_s to avoid unsafe warnings about std::getenv |
| char* value = nullptr; |
| _dupenv_s(&value, nullptr, varName); |
| if (value) { |
| std::string result = value; |
| free(value); |
| return result; |
| } |
| return ""; |
| #else |
| if (auto* val = std::getenv(varName)) { |
| return val; |
| } |
| return ""; |
| #endif |
| } |
| } // namespace |
| |
| namespace wgpu { namespace binding { |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // wgpu::bindings::GPU |
| //////////////////////////////////////////////////////////////////////////////// |
| GPU::GPU() { |
| // TODO: Disable in 'release' |
| instance_.EnableBackendValidation(true); |
| instance_.SetBackendValidationLevel(dawn_native::BackendValidationLevel::Full); |
| |
| instance_.DiscoverDefaultAdapters(); |
| } |
| |
| interop::Promise<std::optional<interop::Interface<interop::GPUAdapter>>> GPU::requestAdapter( |
| Napi::Env env, |
| interop::GPURequestAdapterOptions options) { |
| auto promise = |
| interop::Promise<std::optional<interop::Interface<interop::GPUAdapter>>>(env); |
| |
| if (options.forceFallbackAdapter) { |
| // Software adapters are not currently supported. |
| promise.Resolve({}); |
| return promise; |
| } |
| |
| auto adapters = instance_.GetAdapters(); |
| if (adapters.empty()) { |
| promise.Resolve({}); |
| return promise; |
| } |
| |
| #if defined(_WIN32) |
| constexpr auto defaultBackendType = wgpu::BackendType::D3D12; |
| #elif defined(__linux__) |
| constexpr auto defaultBackendType = wgpu::BackendType::Vulkan; |
| #elif defined(__APPLE__) |
| constexpr auto defaultBackendType = wgpu::BackendType::Metal; |
| #else |
| # error "Unsupported platform" |
| #endif |
| |
| auto targetBackendType = defaultBackendType; |
| |
| // Check for override from env var |
| std::string envVar = getEnvVar("DAWNNODE_BACKEND"); |
| std::transform(envVar.begin(), envVar.end(), envVar.begin(), |
| [](char c) { return std::tolower(c); }); |
| if (envVar == "null") { |
| targetBackendType = wgpu::BackendType::Null; |
| } else if (envVar == "webgpu") { |
| targetBackendType = wgpu::BackendType::WebGPU; |
| } else if (envVar == "d3d11") { |
| targetBackendType = wgpu::BackendType::D3D11; |
| } else if (envVar == "d3d12" || envVar == "d3d") { |
| targetBackendType = wgpu::BackendType::D3D12; |
| } else if (envVar == "metal") { |
| targetBackendType = wgpu::BackendType::Metal; |
| } else if (envVar == "vulkan" || envVar == "vk") { |
| targetBackendType = wgpu::BackendType::Vulkan; |
| } else if (envVar == "opengl" || envVar == "gl") { |
| targetBackendType = wgpu::BackendType::OpenGL; |
| } else if (envVar == "opengles" || envVar == "gles") { |
| targetBackendType = wgpu::BackendType::OpenGLES; |
| } |
| |
| // Default to first adapter if we don't find a match |
| size_t adapterIndex = 0; |
| for (size_t i = 0; i < adapters.size(); ++i) { |
| wgpu::AdapterProperties props; |
| adapters[i].GetProperties(&props); |
| if (props.backendType == targetBackendType) { |
| adapterIndex = i; |
| break; |
| } |
| } |
| |
| auto adapter = GPUAdapter::Create<GPUAdapter>(env, adapters[adapterIndex]); |
| promise.Resolve(std::optional<interop::Interface<interop::GPUAdapter>>(adapter)); |
| return promise; |
| } |
| |
| }} // namespace wgpu::binding |